The JBX05371 1.5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents an essential networking component for organizations deploying high-speed Ruckus-compatible infrastructure. This passive DAC cable delivers exceptional value by eliminating the complexity and power consumption associated with active solutions, while maintaining full 40 Gigabit per second performance. **Technical Specifications:** This cable features precision-engineered 30AWG twinax copper conductors with protective plastic jacketing, ensuring reliable signal transmission over short distances. The QSFP+ to QSFP+ connector configuration provides universal compatibility across Ruckus network switches and compatible equipment. Operating temperature range extends from 0 to 70°C (32 to 158°F), accommodating diverse deployment environments from climate-controlled data centers to industrial settings. **Compliance & Certifications:** Fully compliant with IEEE 802.3ba specifications and SFF-8436 standards, the JBX05371 meets stringent regulatory requirements including RoHS/ELV directives, TUV, and UL certifications. This ensures safe, environmentally responsible operation in enterprise environments and simplifies regulatory compliance documentation. **Applications & Use Cases:** Ideal for short-reach data center connections, server-to-switch uplinks, and switch-to-switch interconnections, this 1.5-meter DAC cable minimizes signal degradation while reducing power consumption compared to active solutions. Perfect for hyper-scale data centers, cloud infrastructure, and enterprise networks requiring reliable 40G connectivity. **Advantages Over Alternatives:** Passive DAC cables eliminate external power requirements, reducing operational complexity and energy costs. Unlike active cables or optical modules, passive solutions generate minimal heat, improving overall system reliability. The 1.5-meter length balances flexibility with performance, suitable for dense rack configurations without excessive cable waste. **Compatibility & Replacement:** Direct replacement for OEM part numbers E40G-QSFP-C-0151 and E40G-QSFP-QSFP-P-0151, ensuring seamless integration with existing Ruckus deployments. Custom brand programming is available for organizations requiring proprietary identification. **Warranty & Support:** Backed by a comprehensive 90-day limited warranty, providing peace of mind for critical infrastructure deployments. Manufactured in Vietnam and China to ISO standards, with domestic warehousing in Danville, CA and Beaufort, SC for rapid delivery. Enjoy free standard shipping on orders exceeding $99.